Scientific Investigations Part 1 Why do we only

§ Why do we only test one variable at a time? § Planner: Check

Date Table of Contents Assignment Page 8/16 8/19 8/20 8/22 Lab Equipment Warm-up Lab

Question/Hypothesis Practice 1. Question/Hypothesis Notes EQ: How is an experiment designed? What is a

What is a Testable Question? Testable Questions have: §A cause (Independent variable) §An effect

Question/Hypothesis Practice 1. Question/Hypothesis Notes Testable Question: What is a testable question? A cause

Testable Question Example §Does changing the height of the ramp affect the speed of

Independent Variable §Does changing the height of the ramp affect the speed of the

§Constants (Controlled Variables): * * Same car Same ramp surface Surface the car roll

On your Whiteboard label the IV and DV in question #2: §Does changing the

Independent Variable §Does changing the amount of light affect the growth rate of plants?

§Constants (Controlled Variables): * * * Same type / size of plant Same wattage

On your Whiteboard label the IV and DV in question #3: §Is the time

Dependent Variable §Is the time it takes to dissolve a sugar cube affected by

§Constants (Controlled Variables): * * * Same size of container Same amount of water

§ Is this a testable question? How does a paper airplane fly? § No,

• To change the question so it is testable: § First list some

1. Let’s do this one together § Second, decide what you are going to

1. Let’s do this one together • Now, select ONE independent variable and ONE

n Does changing the shape of the wing affect the distance the paper airplane

Question/Hypothesis Practice 1. Does changing… Question/Hypothesis Notes EQ: How is an experiment designed? What

Testable Question Formats • Here are some possible sentence starters to create a testable

Question 2 on Page 32. With a partner write a question Question: Will a

Complete Scientific Method Scavenger Hunt • Working as groups fill in the blanks on

Closure • What is a testable question? Write an example. • Scavenger Hunt Homework

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? ? ? Scientific Investigations Part 1 ? ?

§ Why do we only test one variable at a time? § Planner: Check your Notebook titles § Scavenger Hunt Questions 1 -12 (page 28) Absent yesterday? Finish Page 30 -31 Gobstopper Lab from your group. Show me for your candy!

Date Table of Contents Assignment Page 8/16 8/19 8/20 8/22 Lab Equipment Warm-up Lab Coat Safety Word Search Safety Test S. M. Scavenger Hunt Scientific Method Foldable Gobstopper Discussion Gobstopper Lab Question/Hypothesis practice Question/Hypothesis Notes 24 25 26 27 28 29 30 31 32 33

Question/Hypothesis Practice 1. Question/Hypothesis Notes EQ: How is an experiment designed? What is a testable question? Testable Questions: 2. What is a hypothesis? 3. 32 33

What is a Testable Question? Testable Questions have: §A cause (Independent variable) §An effect (Dependent variable) They DO NOT use personal pronouns (I, we, you, etc)

Question/Hypothesis Practice 1. Question/Hypothesis Notes Testable Question: What is a testable question? A cause (Independent variable) An effect (Dependent variable) They DO NOT use personal pronouns (I, we, you, etc) IV EX: Does changing the height of the ramp affect the speed of the car going down the ramp? DV 2. What is a hypothesis? Hypothesis: EX: 3. 32 33

Testable Question Example §Does changing the height of the ramp affect the speed of the car going down the ramp?

Independent Variable §Does changing the height of the ramp affect the speed of the car going down the ramp? Dependent Variable

§Constants (Controlled Variables): * * Same car Same ramp surface Surface the car roll onto etc…

On your Whiteboard label the IV and DV in question #2: §Does changing the amount of light affect the growth rate of plants?

Independent Variable §Does changing the amount of light affect the growth rate of plants?

§Constants (Controlled Variables): * * * Same type / size of plant Same wattage of bulb Same amount of water Same soil Same environmental conditions etc…

On your Whiteboard label the IV and DV in question #3: §Is the time it takes to dissolve a sugar cube affected by temperature? Hot Cold

Dependent Variable §Is the time it takes to dissolve a sugar cube affected by temperature? Independent Variable

§Constants (Controlled Variables): * * * Same size of container Same amount of water Same amount of sugar Same dissolving method used etc…

Question/Hypothesis Practice 1. Question/Hypothesis Notes EQ: How is an experiment designed? What is a testable question? A cause (Independent variable) An effect (Dependent variable) They DO NOT use personal pronouns (I, we, you, etc) IV EX: Does changing the height of the ramp affect the speed of the car going down the ramp? DV 2. What is a hypothesis? Hypothesis: EX: 3. 32 33

§ Is this a testable question? How does a paper airplane fly? § No, because there is not an independent variable and a dependent variable in the question.

• To change the question so it is testable: § First list some variables that you could test that are involved with flight of a paper airplane § wing shape § body shape § type of paper used

1. Let’s do this one together § Second, decide what you are going to measure (dependent variable). For example: § Distance the plane will fly § Length of time the plane stays in the air

1. Let’s do this one together • Now, select ONE independent variable and ONE dependent variable. Put them together to create the testable question. For example:

n Does changing the shape of the wing affect the distance the paper airplane will fly?

Question/Hypothesis Practice 1. Does changing… Question/Hypothesis Notes EQ: How is an experiment designed? What is a testable question? A cause (Independent variable) An effect (Dependent variable) They DO NOT use personal pronouns (I, we, you, etc) IV EX: Does changing the height of the ramp affect the speed of the car going down the ramp? DV Testable Question Format Examples 2. What is a hypothesis? Hypothesis: EX: 3. 32 33

Testable Question Formats • Here are some possible sentence starters to create a testable question. independent variable • Does changing ____ affect ____? independent variable • How does changing _____ affect ______ ? independent variable • What is the effect of _______ on ______?

Question 2 on Page 32. With a partner write a question Question: Will a rocket go higher? ---------------------------------- • First, think of what you could change(test)- that will be your IV. • Second, think of what you could measure or recordthat will be your DV. • Finally, re-word your question using the IV and DV! • Will a rocket go higher if…?

Complete Scientific Method Scavenger Hunt • Working as groups fill in the blanks on the scavenger hunt paper on page 28. • Complete through question 12.

Closure • What is a testable question? Write an example. • Scavenger Hunt Homework 1 -12